<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>

<body>
    <style>
        div {
            color: blue
        }
    </style>
    <div>
        这是什么颜色的
        <style>
            div {
                color: red
            }
        </style>
    </div>
    <style>
        div {
            color: green
        }
    </style>
    <style>
        div {
            color: black
        }
    </style>
</body>

</html>